WO2017215531A1 - Method for adjusting electromagnetically driven swing plate and electromagnetically driven swing plate apparatus - Google Patents

Abstract

Provided is an electromagnetically driven swing plate apparatus (100), comprising: a swing plate (110); a drive coil (120) for receiving a drive signal and using the drive signal to drive the swing plate (110) to swing, wherein, when a frequency of the drive signal is different from a resonance frequency of the swing plate (110), the drive coil (120) receives a new drive signal and uses the new drive signal to drive the swing plate (110) to swing, the frequency of said new drive signal being said resonance frequency. By receiving a new drive signal, a driving frequency of the drive coil (120) is adjusted to be the resonance frequency of the swing plate (110), so that the swing plate (110) swings at the resonance frequency, and thus the swing plate (110) may always be in a resonance status.

Description

Method for adjusting electromagnetic driving type swinging piece and electromagnetic driving type swinging device thereof

This application claims priority to Chinese Patent Application No. 201610435610.3, the invention titled "Method of Adjusting Electromagnetic Drive Type Swing and Its Electromagnetic Drive Type Swing Device", which is filed on June 16, 2016. The entire contents are incorporated herein by reference.

Technical field

The present application relates to the field of semiconductor components, and more particularly to a method of adjusting an electromagnetically driven pendulum and an electromagnetically driven pendulum device thereof.

Background technique

With the high integration of semiconductor components, the size of electronic devices is getting smaller and smaller. Traditional fans cannot meet the requirements of use due to problems such as volume and noise in terms of quietness and long life. Electromagnetic drive pendulums have small volume. Low, no electromagnetic noise, long life, low power consumption and many other advantages are increasingly favored.

When the electromagnetic drive coil is working, an alternating voltage signal is applied to the electromagnetic coil, and the pendulum will oscillate under the action of the electromagnetic force. When the frequency of the alternating voltage and the natural frequency of the pendulum are equal, the pendulum reaches the maximum swing. In order to output a high-speed, directional stable airflow, the effect of ventilation and cooling is generated. However, due to manufacturing problems, it is not easy to determine the natural resonance frequency of each pendulum to a value; and the bigger problem is that even the natural frequency of each piezoelectric piece can be adjusted to a relatively uniform state. After working for a period of time, the natural frequency of each pendulum will change slightly due to changes in parameters and the influence of dust. This not only causes trouble for the manufacture of the fan, but also has high requirements for the working environment.

The above problem is one of the important reasons why the electromagnetically driven pendulum is not used in batch heat dissipation at present. How can the pendulum piece be in a resonant working state under the condition of manufacturing precision deviation, dust accumulation and mechanical property change, and output The maximum air volume, meeting the needs of productization and batch application, is an urgent problem to be solved.

Summary of the invention

The embodiment of the present application provides an electromagnetically driven pendulum device, which can stabilize the pendulum in a resonant state during operation.

In a first aspect, an electromagnetically driven pendulum device is provided, comprising: a pendulum; a drive coil for receiving a drive signal, and driving the pendulum swing by the drive signal, wherein the drive coil is in the drive When the frequency of the signal is different from the resonant frequency of the pendulum, a new drive signal is received and the wobble is driven by the new drive signal, wherein the frequency of the new drive signal is the resonant frequency.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to the resonant frequency of the pendulum by receiving a new driving signal, so that the pendulum can be oscillated at the resonant frequency, so that the pendulum can always be in a resonant state.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the device further includes: a detecting unit, configured to detect a resonant frequency of the pendulum; and a driving unit, where the driving unit is used Generating the drive signal, and when the frequency of the drive signal is different from the resonant frequency of the pendulum, generating the new drive signal and transmitting the new drive signal to the drive coil.

In conjunction with the first aspect, in a second possible implementation of the first aspect, the driving unit is specifically configured to generate the driving signal, and when a difference between a frequency of the driving signal and a resonant frequency of the pendulum When the value is greater than the preset threshold, the new driving signal is generated, and the new driving signal is sent to the driving coil, wherein the preset threshold is less than or equal to 0.5 Hz.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to be consistent with the current resonant frequency of the pendulum, so that the pendulum can always be in a resonant state, and the pendulum can be made in the case of manufacturing precision deviation, dust accumulation, and mechanical property change. Both can make the pendulum in resonance.

In combination with the first aspect and the foregoing implementation manner, in a third possible implementation manner of the first aspect, the driving unit is further configured to: use each of the multiple frequency driving signals in the first duration a driving signal driving the pendulum, wherein the first duration is at least one wobble period of the pendulum, the plurality of frequencies are located in a first frequency interval, and the first frequency interval includes a resonance of the pendulum The detecting unit is configured to: acquire a induced voltage generated by the pendulum in a second time period from the start of each driving signal to stop driving the pendulum, and the second duration is the pendulum At least one wobble period of the slice; the driving unit is further configured to determine a frequency of the drive signal of the drive signal of the plurality of frequencies that generates the largest amplitude and the slowest decay of the induced voltage as the resonant frequency of the pendulum.

In conjunction with the first aspect and the foregoing implementation manner, in a fourth possible implementation manner of the first aspect, the electromagnetic driving type pendulum device further includes a detecting coil, wherein the detecting coil is configured to detect the generated by the pendulum Inductive voltage, the driving unit is specifically configured to: drive each of the driving signals of the plurality of frequencies to drive the pendulum in a first time period, wherein the first duration is the swinging piece At least one swing period, the plurality of frequencies are located in a first frequency interval, the first frequency interval includes a resonant frequency of the pendulum; and the detecting unit is specifically configured to: stop driving at each driving signal by using the detecting coil Acquiring an induced voltage generated by the pendulum during a second time period from the start of the pendulum, the second duration being at least one wobble period of the pendulum; the driving unit is further configured to The frequency of the drive signal that produces the induced voltage with the largest amplitude and the slowest decay among the drive signals of the frequency is determined as the resonant frequency of the pendulum.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can determine the resonant frequency of the pendulum from the plurality of resonant frequencies by detecting the induced voltage generated by the wobble when the pendulum is driven at a plurality of resonant frequencies.

In combination with the first aspect and the foregoing implementation manner, in a fifth possible implementation manner of the first aspect, the driving unit is specifically configured to: drive the swinging swing in a third time period, wherein the third The duration is at least one swing period of the pendulum; the detecting unit is specifically configured to: detect a induced voltage generated by the pendulum within a fourth time period from when the swinging of the pendulum is stopped, wherein The fourth duration is at least one swing period of the pendulum; the frequency of the induced voltage is determined to be the resonant frequency of the pendulum.

In conjunction with the first aspect and the foregoing implementation manner, in the sixth possible implementation manner of the first aspect, the electromagnetic driving type pendulum device further includes a detecting coil, and the driving unit is specifically configured to: Driving the pendulum to oscillate; the detecting unit is specifically configured to: detect, during a fourth time period when the driving of the pendulum is stopped, detecting a induced voltage generated by the pendulum by using a detecting coil; determining the induced voltage The frequency is the resonant frequency of the pendulum.

With reference to the first aspect and the foregoing implementation manner, in a seventh possible implementation manner of the first aspect, the detecting unit includes a voltage sampling unit, where two input ends of the voltage sampling unit and the driving coil are respectively Connected to the end, the voltage sampling unit is configured to acquire an induced voltage generated by the pendulum; the driving unit includes a micro control unit and a power amplifying unit, and an input end of the micro control unit and an output of the voltage sampling unit Connected to the end, the output end of the micro control unit is connected to the input end of the power amplifying unit, and the two output ends of the power amplifying unit are connected to two ends of the driving coil, wherein the micro control unit is used Receiving the induced voltage obtained by the voltage sampling unit, and determining the new driving signal according to the induced voltage obtained by the voltage sampling unit, and transmitting the new driving signal to the power amplifying unit, the power An amplifying unit is configured to power amplify the new driving signal and apply it to both ends of the driving coil.

It should be understood that when the electromagnetically driven pendulum device further includes a detecting coil, an input end of the voltage sampling unit is connected to the detecting coil to obtain a voltage across the detecting coil.

In conjunction with the first aspect and the foregoing implementation manner, in an eighth possible implementation manner of the first aspect, the driving unit is specifically configured to: drive the pendulum by using each of the driving signals of the multiple frequencies respectively a slice, wherein the plurality of frequencies are located in a second frequency interval, the second frequency interval includes a resonant frequency of the pendulum; and the detecting unit is specifically configured to: acquire each of the driving signals to drive the pendulum The current of the driving signal required at the time; determining the frequency of the driving signal that generates the smallest current among the driving signals of the plurality of frequencies as the resonant frequency of the pendulum.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can determine the resonant frequency of the pendulum from the plurality of resonant frequencies by detecting the current value in the driving circuit when driving the pendulum at a plurality of resonant frequencies.

In conjunction with the first aspect and the foregoing implementation manner, in a ninth possible implementation manner of the first aspect, the detecting unit includes a current sampling unit, where the current sampling unit is configured to obtain a driving required to drive the pendulum a current of the signal; the driving unit comprises a micro control unit and a power amplifying unit, an input end of the micro control unit is connected to an output end of the current sampling unit, an output end of the micro control unit and the power amplifying unit The input ends are connected, the two output ends of the power amplifying unit are connected to two ends of the driving coil, wherein the micro control unit is configured to receive a current value obtained by the current sampling unit, and determine the new And driving the signal to send the new driving signal to the power amplifying unit, wherein the power amplifying unit is configured to power amplify the new driving signal and apply it across the driving coil.

In combination with the first aspect and the foregoing implementation manner, in the tenth possible implementation manner of the first aspect, the electromagnetic driving swing device further includes: a detecting coil and a driving unit, wherein the detecting coil and the detecting coil a driving coil coupling connection for detecting an induced voltage generated when the pendulum swings; two input ends of the driving unit are respectively connected to two ends of the detecting coil, and two output ends of the power amplifying unit are respectively Connected to both ends of the driving coil, the power amplifying unit is configured to power amplify a voltage across the detecting coil to obtain the new driving signal, and apply the new driving signal to the Drive both ends of the coil.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can maintain the pendulum while oscillating at the resonance frequency, thereby being able to resonate to generate the maximum amplitude.

In conjunction with the first aspect and the foregoing implementation manner, in an eleventh possible implementation manner of the first aspect, the electromagnetic driving pendulum device further includes: an automatic gain control unit, the automatic gain control unit includes a first An input terminal, a second input end, and an output end, wherein the first input end is connected to the detecting coil, the first input end is configured to receive a voltage across the detecting coil, the second input end is a driving coil connection, the second input end is for receiving a voltage across the driving coil, the output end is connected to an input end of the power amplifying unit, and the automatic gain control unit is configured to be in the driving coil Under the control of the voltage of the terminal, a voltage corresponding to the voltage frequency of the detecting coil is outputted by the output terminal.

In conjunction with the first aspect and the foregoing implementation manner, in the twelfth possible implementation manner of the first aspect, the electromagnetic driving and pendulum device further includes: a power amplifying unit, an operational amplifier, and a bridge, wherein The bridge includes a first bridge arm having the drive coil, a second bridge arm having a first resistance, a third bridge arm having a third resistance, and a fourth bridge arm having a fourth resistance, wherein a second end of the first bridge arm is connected to the first end of the second bridge arm, and a second end of the third bridge arm is connected to the first end of the fourth bridge arm, the power amplification unit a first output end is respectively connected to the first end of the first bridge arm and the first end of the three bridge arm, and the second output end of the power amplifying unit is respectively connected to the second bridge arm and the first The second ends of the four bridge arms are connected, two of the operational amplifiers The input ends are respectively connected to the second end of the first bridge arm and the second end of the third bridge arm, and an output end of the operational amplifier is connected to an input end of the power amplifying unit; the operational amplifier is used for Subtracting the second end potential of the first bridge arm and the second end potential of the third bridge arm, and outputting the result to the power amplifying unit; the power amplifying unit is configured to perform the operation The voltage output from the amplifier is power amplified to obtain the new drive signal and the new drive signal is applied across the drive coil.

With reference to the first aspect and the foregoing implementation manner, in a thirteenth possible implementation manner of the first aspect, the ratio of the inner resistance of the driving coil to the first resistance is a first ratio, and the second resistor The ratio of the third resistor is a second ratio, and the first ratio and the second ratio are equal.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can maintain the pendulum while oscillating at the resonance frequency, thereby being able to resonate to generate the maximum amplitude.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to be consistent with the current resonant frequency of the pendulum, so that the pendulum can always be in a resonant state, and the pendulum can be made in the case of manufacturing precision deviation, dust accumulation, and mechanical property change. The pendulum can be placed in a resonant state, so that the power consumption of the circuit can be minimized, and the amount of wind generated when the pendulum swings is maximized.

In a second aspect, a method of adjusting an electromagnetically driven pendulum includes a coil and a pendulum, the method comprising: transmitting a drive signal to the drive coil to utilize the drive signal Driving the pendulum to swing; when a driving frequency of a driving signal of the driving coil is different from a resonant frequency of the pendulum, transmitting a new driving signal to the driving coil, wherein a driving frequency of the new driving signal The resonant frequency is such that the drive coil drives the pendulum to oscillate.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the driving frequency of the driving signal of the driving coil is different from the resonant frequency of the swinging piece, including: driving of a driving signal of the driving coil The difference between the frequency and the resonant frequency of the pendulum is greater than a predetermined threshold, wherein the predetermined threshold is less than or equal to 0.5 Hz.

In conjunction with the second aspect, in a second possible implementation of the second aspect, the method further comprises: detecting a resonant frequency of the pendulum.

Therefore, by detecting the resonant frequency of the pendulum, it can be determined whether the driving frequency of the current driving signal is the same as the resonant frequency of the pendulum, and it is determined whether a new driving signal is transmitted to the driving coil.

With reference to the second aspect and the foregoing implementation manner, in a third possible implementation manner of the second aspect, the detecting the resonant frequency of the pendulum comprises: driving the multiple frequencies respectively in the first time period Each of the signals in the signal drives the pendulum, wherein the first duration is at least one wobble period of the pendulum, the plurality of drive frequencies are located in a first frequency interval, and the first frequency interval comprises Resonant frequency of the pendulum; acquiring a induced voltage generated by the pendulum in a second time period from the start of each driving signal to stop driving the pendulum, wherein the second duration is the pendulum At least one wobble period; determining a frequency of a drive signal of the induced voltage that generates the largest amplitude and the slowest decay among the plurality of frequency drive signals as the resonant frequency of the pendulum.

With reference to the second aspect and the foregoing implementation manner, in a fourth possible implementation manner of the second aspect, the detecting the resonant frequency of the pendulum comprises: using each of the driving signals of the multiple frequencies respectively Signaling the pendulum, wherein the plurality of frequencies are located in a second frequency interval, the second frequency interval comprising a resonant frequency of the pendulum; and obtaining each of the driving signals required to drive the pendulum The current of the drive signal; the frequency of the drive signal that produces the smallest current among the plurality of frequency drive signals is determined as the resonant frequency of the pendulum.

With reference to the second aspect and the foregoing implementation manner, in a fifth possible implementation manner of the second aspect, the detecting the resonant frequency of the pendulum comprises: driving the pendulum swing in a third duration Wherein the third time Growing at least one wobble period of the pendulum; detecting a induced voltage generated by the pendulum during a fourth period of time from when the pendulum is stopped, wherein the fourth duration is the pendulum At least one wobble period; determining a frequency of the induced voltage as a resonant frequency of the pendulum.

In a third aspect, an apparatus is provided, comprising: a processor, a receiver, a transmitter, and a memory, the processor and the memory being connected by a bus system, the memory for storing instructions, and the processor is configured to execute The memory stores instructions to control the receiver to receive a signal, the transmitter to transmit a signal, such that the apparatus performs the method of any of the possible implementations of the second aspect or the second aspect.

In a fourth aspect, a computer readable medium is provided for storing a computer program comprising instructions for performing the method of the first aspect or any of the possible implementations of the first aspect.

DRAWINGS

1 is a schematic structural view of an electromagnetic drive pendulum device of an embodiment of the present application.

2 is a schematic structural view of an electromagnetic drive pendulum device of one embodiment of the present application.

3 is a schematic structural view of an electromagnetic drive swing device of an embodiment of the present application.

4 is a schematic structural view of an electromagnetic drive swing device of an embodiment of the present application.

FIG. 5 is a schematic structural view of an electromagnetic drive swinging device according to another embodiment of the present application.

Figure 6 is a schematic structural view of an electromagnetic drive swinging device of another embodiment of the present application.

FIG. 7 is a schematic flow chart of a method of modulating an electromagnetically driven pendulum according to still another embodiment of the present application.

Fig. 8 is a schematic structural view of an electromagnetic drive pendulum device of an embodiment of the present application.

9 is a schematic voltage signal diagram of one embodiment of the present application.

Figure 10 is a schematic voltage signal diagram of one embodiment of the present application.

Figure 11 is a schematic voltage signal diagram of one embodiment of the present application.

Figure 12 is a schematic structural view of an electromagnetic drive swing device of an embodiment of the present application.

Figure 13 is a schematic structural view of an electromagnetic drive pendulum device of an embodiment of the present application.

Figure 14 is a schematic circuit diagram of voltage acquisition in accordance with one embodiment of the present application.

Figure 15 is a schematic circuit diagram of voltage acquisition in accordance with one embodiment of the present application.

Figure 16 is a schematic structural view of an electromagnetic drive swing device of an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

1 is a schematic structural view of an electromagnetic drive swing device according to an embodiment of the present application. As shown in FIG. 1, the electromagnetic drive swing device 100 includes:

Swing 110.

The driving coil 120 is configured to receive a driving signal, and drive the swinging plate 110 to swing by using the driving signal, wherein the driving coil 120 receives a new driving signal when the frequency of the driving signal is different from the resonant frequency of the swinging plate 110, and utilizes a new The drive signal drives the pendulum 110 to oscillate, wherein the frequency of the new drive signal is the resonant frequency of the pendulum 110.

Due to the difference in manufacturing precision of different pendulums, different pendulums may have different resonant frequencies. Even for the same pendulum, the resonant frequency may change due to possible dust accumulation, mechanical property changes, etc. during use. Therefore, the current resonant frequency of the pendulum can reflect a natural frequency of the pendulum under the current working condition.

Based on the resonance principle of the second-order system of the pendulum, when the pendulum is excited by the electromagnetic coil, only when the frequency of the magnetic field of the electromagnetic coil is consistent with the natural frequency of the pendulum, it is most easy to drive the pendulum to swing with the maximum swing. It should be understood that in the embodiment of the present application, the driving voltage refers to the voltage across the electromagnetic coil loaded with the electromagnetically driven pendulum, which may also be referred to as an excitation voltage, and the natural frequency of the pendulum may also be referred to as a resonant frequency.

Due to manufacturing problems, it is not easy to determine the natural resonant frequency of each pendulum to a value; even if the natural frequency of each piezoelectric piece can be adjusted to a relatively uniform state, after each working period, each pendulum The natural frequency of the chip will change slightly due to changes in parameters and the influence of dust, etc., that is, the resonant frequency of the pendulum may change.

When the electromagnetic drive coil is working, an alternating voltage signal is applied to the electromagnetic coil, and the pendulum will oscillate under the action of the electromagnetic force. When the frequency of the alternating voltage and the natural frequency of the pendulum are equal, the pendulum is used as the semiconductor device. The fan can reach the maximum swing, thereby outputting a high-speed, directional stable airflow, resulting in ventilation and cooling.

When the driving frequency applied to the driving coil 120 is different from the resonant frequency of the swinging plate 110, it is necessary to adjust the driving frequency of both ends of the driving coil 120. Therefore, the driving coil 120 receives a new driving signal, and the driving frequency in the new driving signal is The resonant frequency of the pendulum 110 is the same so that the pendulum 210 can always operate at the resonant frequency of the pendulum 110, in a resonant state to produce maximum amplitude.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to the resonant frequency of the pendulum by receiving a new driving signal, thereby causing the pendulum to oscillate at the resonant frequency, so that the pendulum can always be in a resonant state.

Optionally, as an embodiment of the present application, the electromagnetic driving type pendulum device further includes:

a detecting unit for detecting a resonant frequency of the pendulum.

a driving unit for generating a driving signal, and when the driving frequency of the driving coil 120 is different from the resonant frequency of the swinging plate 110, adjusting a driving frequency of the driving coil 120 such that a driving frequency of the driving coil 120 is a resonant frequency, and A new drive signal is sent to the drive coil 120.

Specifically, due to the difference in manufacturing precision of different pendulums, different pendulums may have different resonant frequencies. Even for the same pendulum, due to possible dust accumulation, mechanical property changes, etc. during use, the resonant frequency also has The change may occur. Therefore, the pass detecting unit over-detects the resonant frequency of the pendulum 110 in the current state to obtain the natural frequency of the pendulum 110 in the current working state, so as to adjust the driving frequency of the driving coil 120.

Specifically, when the driving frequency of the driving coil 120 is different from the resonant frequency of the swinging plate 110, a new driving signal can be output through the driving unit, and the signal can adjust the driving frequency applied to the driving coil 120, so that the swinging plate 110 can always be Maintaining operation at the resonant frequency allows resonance to produce maximum amplitude.

In a specific implementation process, it can be determined whether the difference between the resonant frequency of the pendulum 110 and the driving frequency is greater than a certain preset threshold, and then the driving frequency of the driving coil is adjusted. For example, the preset threshold may be 0.3 Hz, 0.5 Hz, etc. , generally less than 0.5 Hz, it should be understood that the application is not limited thereto.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to be consistent with the current resonant frequency of the pendulum, so that the pendulum can always be in a resonant state, and the pendulum can be made in the case of manufacturing precision deviation, dust accumulation, and mechanical property change. Both can make the pendulum in resonance.

Optionally, as an embodiment of the present application, the driving unit is further configured to: drive the swinging plate 110 by using a plurality of driving frequencies in a first time period, wherein the plurality of driving frequencies are located in the first frequency interval, wherein, The first time is at least one pendulum cycle of the pendulum; the detecting unit is specifically configured to: respectively acquire an induced voltage generated within a second time period from when the driving of the pendulum 110 is stopped, wherein the second duration is at least one of the pendulum Swing cycle; multiple drives The driving frequency corresponding to the induced voltage having the largest amplitude and the slowest attenuation among the induced voltages generated by the frequency is determined as the resonant frequency of the pendulum.

It should be understood that the first duration is a preset period of time, for example, may be set between 0.1 seconds and 1 second. The first time period is determined by the fact that the swing of the pendulum can be almost completely pushed (90%) at the natural frequency point. Therefore, the longer the first duration is, the more advantageous it is to find the resonant frequency.

The second duration is also a preset period of time. The second duration is used to detect the induced voltage frequency generated by the pendulum. The second duration is too short to determine the attenuation rule of the signal. Too long is a waste of time. Therefore, generally It can be selected between 0.1 seconds and 1 second, and the application is not limited thereto.

In a specific implementation, the resonant frequency of the pendulum may change within a frequency interval, and only the driving frequency needs to be changed within the specific frequency interval to obtain the resonant frequency of the pendulum. We refer to the specific frequency interval as the first a frequency interval, the first frequency interval is the maximum possible frequency interval estimated according to the design and manufacture situation, including the resonant frequency of the pendulum, and the general resonant frequency does not exceed this range. For example, the natural resonant frequency of the pendulum design is 60 Hz. The first frequency interval can be set from 55 Hz to 65 Hz. The possibility that the newly produced pendulum piece exceeds this frequency is extremely small. Therefore, it is only necessary to change the driving frequency in the range of 55-65 Hz to obtain the resonant frequency of the pendulum. It should be understood that the above numerical examples are merely exemplary. This application is not limited to this.

Specifically, when the swinging plate 110 is driven by a certain driving frequency within the first time period, the swinging piece 110 will be swung under the excitation of the driving coil 120, and after the first time period is over, the excitation of the driving coil 120 is stopped. In the second time period immediately afterwards, the pendulum piece 110 will continue to oscillate for a period of time, and when the pendulum piece 110 swings in the second time period, the movement of the magnetic line of the cutting line is performed, so that a feeling is generated on the driving coil 120. The induced voltage is obtained by detecting the induced voltage for the second time period, thereby obtaining an induced voltage generated under the driving frequency condition.

It should be understood that the electromagnetic driving type pendulum device may further include a detecting coil that detects the induced voltage generated by the pendulum 110 during the second time period after the driving of the coil is stopped, so that the driving unit detects the detecting coil according to the detecting coil. The induced voltage is determined to determine that when the driving frequency of the driving coil 120 needs to be adjusted, a new driving signal is sent to the driving coil 120, wherein the induced voltage generated by the plurality of driving frequencies has the largest amplitude and the slowest attenuation. The driving frequency corresponding to the generated voltage is the resonant frequency of the pendulum.

Specifically, since the driving frequency of the driving voltage applied across the driving coil 120 is larger than the natural frequency of the pendulum, the amplitude of the induced voltage detected by the detecting unit is small; when the driving frequency is closer to the natural frequency, Then, the amplitude of the induced voltage detected by the detecting unit is relatively large and the attenuation is fast; when the driving frequency is consistent with the natural frequency of the pendulum, the amplitude of the induced voltage generated by the pendulum is high and the attenuation is slow. According to the above steps, the driving coil is driven by a plurality of different driving frequencies to detect the induced voltage generated by the pendulum at different driving frequencies, and a plurality of different induced voltages can be obtained by comparing the different feelings. The voltage is generated, and the driving frequency corresponding to the voltage in which the amplitude is the largest and the slowest is the slowest is determined as the resonant frequency or the natural frequency of the pendulum.

Optionally, as an embodiment of the present application, as shown in FIG. 2, the detecting unit includes a voltage sampling unit, and two input ends of the voltage sampling unit are connected to both ends of the driving coil, and the voltage sampling unit is configured to acquire the generated piece. Inducing voltage; the driving unit comprises a micro control unit and a power amplifying unit; the input end of the micro control unit is connected to the output end of the voltage sampling unit, the output end of the micro control unit is connected to the input end of the power amplifying unit, and the two power amplifying units are connected The output ends are connected to the two ends of the driving coil, wherein the micro control unit is configured to receive the induced voltage obtained by the voltage sampling unit, and determine a new driving signal according to the induced voltage obtained by the voltage sampling unit, and send a new driving signal to A power amplifying unit is configured to power amplify the new driving signal and apply it to both ends of the driving coil.

It should be understood that, for simplicity in Figure 2, the pendulum coupled to the drive coil is not shown.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can determine the resonant frequency of the pendulum from the plurality of resonant frequencies by detecting the induced voltage generated by the wobble when the pendulum is driven at a plurality of resonant frequencies.

Optionally, as an embodiment of the present application, the driving unit is specifically configured to: drive the swinging plate 110 to swing using a plurality of driving frequencies, wherein the plurality of driving frequencies are located in the second frequency interval; and the detecting unit is specifically configured to: acquire multiple The driving frequency drives a plurality of driving currents when driving the pendulum 110; determining a driving frequency corresponding to a driving current having a minimum current value among the plurality of driving currents is a resonant frequency of the pendulum 110.

Specifically, when the driving coil 120 excites the pendulum 110 to swing, if the driving frequency coincides with the resonant frequency of the pendulum 110, the operating current at the driving frequency is the minimum. Therefore, the above-described pendulum 110 is driven by a plurality of different driving frequencies to detect the operating current when the pendulum 110 is oscillated at different driving frequencies, and a plurality of different operating current values can be obtained by comparing the various different operations. The current value can be determined as the resonant frequency or the natural frequency of the pendulum 110 when the operating current value is minimized.

Alternatively, the driving frequency can be continuously adjusted in real time such that the current driving frequency is maintained at the natural frequency of the pendulum. Specifically, the current value of the working circuit can be detected at the current operating frequency point, and then a small frequency is used. Drive incrementally to detect the current value after the drive frequency increases. If the current amplitude decreases after increasing, use the increased frequency as the reference frequency, continue to increase a frequency increment, and repeat the previous steps until The current value of the working circuit does not change or becomes larger; if the current of the working current increases, the frequency needs to be reduced by a small amount, and the comparison is continued. If the current value after the frequency decreases, the driving frequency continues to be reduced. Until the operating current remains the same or decreases. So reciprocating, the current drive frequency can be locked to the resonant frequency of the pendulum 110. This way of adjusting the driving frequency is relatively smooth, and there is no pause of the pendulum.

Preferably, in a specific implementation, the resonant frequency of the pendulum may change within a frequency interval, and only the driving frequency needs to be changed within the specific frequency interval to obtain the resonant frequency of the pendulum, and we will specify the specific frequency interval. It is called the second frequency interval, and the second frequency interval is the maximum possible frequency interval estimated according to the design and manufacture. The second frequency interval includes the resonant frequency of the pendulum. The general resonant frequency does not exceed this range, such as the pendulum design. The natural resonant frequency is 60 Hz, and the second frequency interval can be set to 55 Hz to 65 Hz. The possibility that the newly produced pendulum piece exceeds this frequency is extremely small. Therefore, it is only necessary to change the driving frequency in the range of 55-65 Hz to obtain the resonant frequency of the pendulum. It should be understood that the above numerical examples are merely exemplary. This application is not limited to this.

After the detecting unit determines the current resonant frequency of the pendulum, the driving unit adjusts the current driving frequency to be consistent with the current resonant frequency of the pendulum, so that the pendulum is in a resonant state, so that the pendulum swing amplitude is maximized.

Optionally, as an embodiment of the present application, as shown in FIG. 3, the detecting unit includes a current sampling unit for obtaining a current of a driving signal required to drive the pendulum; the driving unit includes a micro control unit and power amplification. The input end of the micro control unit is connected to the output end of the current sampling unit, and the output end of the micro control unit is connected to the input end of the power amplifying unit, and the two output ends of the power amplifying unit are connected to both ends of the driving coil, wherein The micro control unit is configured to receive the current value obtained by the current sampling unit, determine a new driving signal, and send a new driving signal to the power amplifying unit, and the power amplifying unit is configured to perform power amplification on the new driving signal and apply the driving coil to the driving coil. Both ends.

It should be understood that, for simplicity in Figure 3, the pendulum coupled to the drive coil is not shown.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can determine the resonant frequency of the pendulum from the plurality of resonant frequencies by detecting the current value in the driving circuit when driving the pendulum at a plurality of resonant frequencies.

Optionally, as an embodiment of the present application, the driving unit is specifically configured to: drive the swinging piece in a third time period 110 oscillating; the detecting unit is specifically configured to: detect the induced voltage generated by the pendulum in a fourth time period from the moment when the driving of the pendulum 110 is stopped; and determine the frequency of the induced voltage as the resonant frequency of the pendulum.

Specifically, after the driving unit circuit is powered on, the swinging piece 110 is driven for a period of time, and then the driving is stopped. At this time, the swinging piece 110 is free to swing, and the detecting unit detects the frequency of the induced voltage generated by the swinging piece 110, and the swinging piece 110 generates The frequency of the induced power source is the resonant frequency of the pendulum 110, and the driving frequency of the adjusting working circuit is the resonant frequency of the pendulum, which can drive the pendulum to operate at the resonant frequency.

The third duration and the fourth duration are also preset periods. Specifically, the third duration is at least one swing period of the pendulum, the fourth duration is at least one swing period of the pendulum, and the third duration is used for driving. The swinging of the pendulum, for example, may be several cycles of the driving signal, which is not limited in the application. The fourth duration is used to detect the induced voltage frequency generated by the pendulum. The fourth duration is too short to judge the attenuation law of the signal. Longer is a waste of time, so it can generally be selected between 0.1 seconds and 1 second, and the application is not limited thereto.

Optionally, as an embodiment of the present application, the electromagnetic driving type pendulum device further includes: a detecting coil and a power amplifying unit, wherein the detecting coil is configured to detect an induced voltage generated when the pendulum swings; and the power amplifying unit Two input ends are respectively connected to two ends of the detecting coil, two output ends of the power amplifying unit are respectively connected with two ends of the driving coil, and the power amplifying unit is configured to perform power of voltages across the detecting coil After amplification, the new drive signal is obtained and the new drive signal is applied across the drive coil.

Specifically, as shown in FIG. 4, the electromagnetic driving type pendulum device includes a pendulum piece 401, a driving coil 402, a detecting coil 403, and a power amplifying unit 404. The driving coil 402 is used to drive the pendulum 401 to swing, and the detecting coil 403 is used to detect the induced voltage generated by the swinging of the pendulum 401. The detecting coil 403 can be wound around the driving coil 402, or can be wound separately. It is the detection coil 402 that the drive coil 403 is wound separately.

Specifically, when the circuit shown in FIG. 4 is powered on, a noise voltage is generated at both ends of the driving coil 402, so that the pendulum 401 can be slightly driven by the noise in the circuit, and the detecting coil 403 will detect. To the induced voltage generated by the pendulum, the frequency of the induced voltage generated by the pendulum 401 is the resonant frequency of the pendulum 401, and the induced voltage signal outputted by the detecting coil 403 is amplified by the power amplifying unit to obtain a new one. The drive signal is then applied to both ends of the drive coil 402 so that the pendulum 401 can operate at a resonant frequency.

Optionally, as an embodiment of the present application, the electromagnetic driving type pendulum device further includes: an automatic gain control unit, wherein the automatic gain control unit includes a first input end, a second input end, and an output end, and the first input end and the detecting end The coil is connected, the first input end is for receiving the voltage across the detecting coil, the second input end is connected to the driving coil, the second input end is for receiving the voltage across the driving coil, and the output end is connected to the input end of the power amplifying unit The automatic gain control unit is configured to output, by the output terminal, a voltage that is consistent with the voltage frequency of the detection coil under the control of the voltage across the drive coil.

It should be understood that, in the specific implementation process, the electromagnetic driving type pendulum device may further include: an amplifying unit, an amplifying phase shifting unit, etc., as shown in FIG. 5, after the induced power source detected by the detecting coil is amplified and phase shifted Input to the automatic gain control unit, and the sampling voltage of the driving coil is also sent to the automatic gain control unit after being amplified, so that the voltage of the output and the detection coil is suppressed by the automatic gain control unit under the control of the received driving voltage. The output voltage, the stabilized voltage signal of the output is amplified by the power amplifying unit, and then reapplied to both ends of the driving coil, so that the circuit of the entire electromagnetic driving pendulum device can be maintained in a self-oscillating state, that is, the pendulum It can oscillate and oscillate at the resonant frequency of the pendulum.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can maintain the pendulum to oscillate at a resonant frequency. Thereby it is possible to resonate to produce the largest amplitude.

Optionally, as an embodiment of the present application, the electromagnetic driving pendulum device further includes: a power amplifying unit, an operational amplifier, and a bridge, as shown in FIG. 6, wherein the bridge includes the first one having the driving coil. a bridge arm, a second bridge arm having a first resistance, a third bridge arm having a third resistance, and a fourth bridge arm having a fourth resistance, wherein the first end of the first bridge arm and the first end of the second bridge arm Connected to the end, the second end of the third bridge arm is connected to the first end of the fourth bridge arm, and the first output end of the power amplifying unit is respectively connected to the first end of the first bridge arm and the first end of the third bridge arm, The second output end of the power amplifier is respectively connected to the second end of the second bridge arm and the second end of the fourth bridge arm, and the two input ends of the operational amplifier are respectively connected to the second end of the first bridge arm and the third bridge arm Connected to the second end, the output of the operational amplifier is connected to the input of the power amplifying unit; the operational amplifier is used to subtract the second terminal potential of the first bridge arm and the second terminal potential of the third bridge arm, and The result is output to a power amplifying unit; the power amplifying unit is used for The voltage output from the operational amplifier is power amplified to obtain a new drive signal, and a new drive signal is applied across the drive coil.

Specifically, after the power amplifying unit applies a voltage to the bridge, when the pendulum does not swing, the potential difference between the second end potential of the first bridge arm and the second end potential of the third bridge arm is a certain value, but when the pendulum is When the chip is oscillated, an induced voltage is generated, so that the difference between the voltages of the two output terminals is changed. When determining the resistance relationship between the internal resistance of the driving coil, the first resistor, the second resistor, and the third resistor, the operational amplifier will The changed voltage value is picked up, that is, the induced voltage generated by the swing of the pendulum can be picked up by the operational amplifier, so that the resonant frequency of the pendulum can be obtained, and the voltage is amplified and phase-shifted and then input to the power amplifying unit to obtain a new one. The driving signal is capable of applying a new driving signal to both ends of the driving coil. The power amplifying unit may be an H-bridge circuit, and the application is not limited thereto.

Preferably, as an embodiment of the present application, the ratio of the internal resistance of the driving coil to the first resistance is a first ratio, and the ratio of the second resistance to the third resistance is a second ratio, and the first ratio and the second ratio are equal.

The ratio of the internal resistance of the coil to the first resistance is equal to the ratio of the second resistance to the third resistance. Specifically, for example, the internal resistance of the coil is r, the resistance of the first resistor is R1, and the structure of the second resistor is R2, and the third The resistance of the resistor is R3, then the following relationship is satisfied between them:

In this case, after the power amplifying unit applies a voltage to the bridge, when the pendulum does not swing, the potential difference between the potential of the second end of the first bridge arm and the potential of the second end of the third bridge arm is a certain value. However, when the pendulum swings, the induced voltage will be generated, so that the voltage difference between the two output terminals of the bridge is not zero, and the op amp will pick up the voltage. At this time, the voltage obtained by the operational amplifier and the resonance of the pendulum The frequency is consistent, and the voltage is input to the power amplifying unit after being amplified and phase-shifted.

Therefore, the electromagnetically driven pendulum device of the embodiment of the present application can maintain the pendulum while oscillating at the resonance frequency, thereby being able to resonate to generate the maximum amplitude.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to be consistent with the current resonant frequency of the pendulum, so that the pendulum can always be in a resonant state, and the pendulum can be made in the case of manufacturing precision deviation, dust accumulation, and mechanical property change. The pendulum can be placed in a resonant state, so that the power consumption of the circuit can be minimized, and the amount of wind generated when the pendulum swings is maximized.

FIG. 7 is a schematic flowchart of a method for adjusting an electromagnetically driven pendulum according to an embodiment of the present application. The execution body of the method may be a working device for electromagnetically driving the pendulum, and the electromagnetic driving pendulum in the working device includes Drive Coils and pendulums. As shown in FIG. 7, the method 700 includes:

Step 710, transmitting a driving signal to the driving coil to drive the swing of the swing with the driving signal.

Step 720: When the driving frequency of the driving signal of the driving coil is different from the resonant frequency of the pendulum, a new driving signal is sent to the driving coil, wherein the driving frequency of the new driving signal is a resonant frequency, so that the driving coil drives the swing of the pendulum.

Optionally, as an embodiment of the present application, the method further includes: detecting a resonant frequency of the pendulum.

Optionally, as an embodiment of the present application, the detecting the resonant frequency of the pendulum includes: driving the driving coil by using a plurality of driving frequencies respectively in a first time period, wherein the plurality of driving frequencies are located in the first frequency interval Acquire the induced voltage generated by the pendulum in the second time period in which the driving frequency stops driving the driving coil, respectively; the induced voltage which maximizes the amplitude of the induced voltage generated by the plurality of driving frequencies and the slowest decaying The corresponding drive frequency is determined as the resonant frequency of the pendulum.

The first duration is a preset period of time, for example, may be set between 0.1 seconds and 1 second. The first time length is determined by the fact that the pendulum can be pushed almost at (90%) swing swing at the natural frequency point. Therefore, the longer the first duration is, the more advantageous it is to find the resonant frequency.

Preferably, in a specific implementation, the resonant frequency of the pendulum may change within a frequency interval, and only the driving frequency needs to be changed within the specific frequency interval to obtain the resonant frequency of the pendulum, and we will specify the specific frequency interval. It is called the first frequency interval. The first frequency interval is the maximum possible frequency interval estimated according to the design and manufacture. The general resonant frequency does not exceed this range. For example, the natural resonant frequency of the pendulum design is 60 Hz, then the first frequency interval. Can be set to 55Hz to 65Hz. The possibility that the newly produced pendulum piece exceeds this frequency is extremely small. Therefore, it is only necessary to change the driving frequency in the range of 55-65 Hz to obtain the resonant frequency of the pendulum. It should be understood that the above numerical examples are merely exemplary. This application is not limited to this.

Optionally, as an embodiment of the present application, the detecting the resonant frequency of the pendulum includes: driving the pendulums respectively using a plurality of driving frequencies, wherein the plurality of driving frequencies are located in the second frequency interval; respectively acquiring the plurality of driving A plurality of driving currents required for driving the pendulum at a frequency; determining a driving frequency corresponding to a driving current having a minimum current value among the plurality of driving currents as a resonance frequency of the pendulum.

Since the driving frequency is the same as the resonant frequency of the pendulum when the driving coil excites the pendulum, the operating current at the driving frequency is the minimum. Therefore, the driving coil is driven by a plurality of different driving frequencies to detect the operating current when the pendulum swings at different driving frequencies, and various operating current values can be obtained by comparing the various operating current values. The driving frequency corresponding to the minimum of the operating current value is determined as the resonant frequency or the natural frequency of the pendulum.

Preferably, in a specific implementation, the resonant frequency of the pendulum may change within a frequency interval, and only the driving frequency needs to be changed within the specific frequency interval to obtain the resonant frequency of the pendulum, and we will specify the specific frequency interval. It is called the second frequency interval, and the second frequency interval is the maximum possible frequency interval estimated according to the design and manufacture. The general resonant frequency does not exceed this range. For example, the natural resonant frequency of the pendulum design is 60 Hz, and the second frequency interval. Can be set to 55Hz to 65Hz. The possibility that the newly produced pendulum piece exceeds this frequency is extremely small. Therefore, it is only necessary to change the driving frequency in the range of 55-65 Hz to obtain the resonant frequency of the pendulum. It should be understood that the above numerical examples are merely exemplary. This application is not limited to this.

Optionally, as an embodiment of the present application, the detecting the resonant frequency of the pendulum includes: driving the pendulum swing in the third time period; detecting the feeling generated by the pendulum in the fourth time period from when the driving of the pendulum is stopped. The voltage is generated; the frequency of the induced voltage is determined as the resonant frequency of the pendulum.

Specifically, after the circuit is powered up, the pendulum is driven for a period of time, and then the driving is stopped. At this time, the pendulum swings freely, and the frequency of the induced voltage generated by the pendulum is detected. The frequency of the induced power generated by the pendulum is The resonant frequency of the pendulum, the driving frequency of the regulating working circuit is the resonant frequency of the pendulum, and the pendulum can be driven to operate at the resonant frequency.

It should be understood that the third frequency interval is the maximum possible frequency interval estimated according to the design and manufacture. The general resonant frequency does not exceed this range. For example, the natural resonant frequency of the pendulum design is 60 Hz, and the third frequency interval can be set to 55 Hz. To 65Hz. The possibility that the newly produced pendulum piece exceeds this frequency is extremely small. Therefore, it is only necessary to change the driving frequency in the range of 55-65 Hz to obtain the resonant frequency of the pendulum. It should be understood that the above numerical examples are merely exemplary. This application is not limited to this.

It should be understood that the method 700 according to an embodiment of the present application may correspond to performing the actions of the various units in the electromagnetically driven pendulum device 100 in the embodiments of the present application, and the above and other operations and/or functions of the method 700 are respectively implemented in order to implement the Corresponding flow corresponding to the electromagnetic driving type pendulum device 100 in 2, for brevity, will not be described herein.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to be consistent with the current resonant frequency of the pendulum, so that the pendulum can always be in a resonant state, and the pendulum can be made in the case of manufacturing precision deviation, dust accumulation, and mechanical property change. The pendulum can be placed in a resonant state, so that the power consumption of the circuit can be minimized, and the amount of wind generated when the pendulum swings is maximized.

Figure 8 is a schematic circuit diagram of one embodiment of the present application. This circuit is a specific circuit diagram for realizing the electromagnetically driven pendulum device shown in FIG.

As shown in FIG. 8, a Microcontroller Unit (MCU) generates a driving signal, for example, the driving signal may be a Sinusoidal Pulse Width Modulation (SPWM) wave or a Pulse Width Modulation (PWM) wave. The signal is amplified by power and applied to both ends of the electromagnetic coil, and the pendulum swings under the driving of the electromagnetic coil. For example, specifically, the power amplifying unit may be an H-bridge driving circuit. In a normal working state, the H-bridge outputs a differential driving voltage; when it is required to detect the induced voltage generated by the pendulum, the output of the H-bridge is controlled. The state is high impedance state, which can prevent the induced voltage from short-circuiting after power amplification, so as to facilitate sampling circuit detection. After sampling and amplifying the voltage of the induced voltage, an analog-to-digital converter (ADC) collects the sampled signal. The H-bridge drive circuit, the micro-control unit, and the like constitute a drive unit in the electromagnetic drive type pendulum device shown in FIG. 1, and the voltage sampling unit, the digital-to-analog converter, and the like constitute the electromagnetic drive type swing piece shown in FIG. A detection unit in the device. It should be understood that the pendulum is not shown in the figure for the sake of brevity.

Specifically, during the time period t1, the signal generated by the MCU applies excitation to the coil. After the t1 period ends, the signal generated by the MCU no longer applies excitation to the coil, and is collected by the ADC during the t2 period from the end of the t1 period. The change of the induced voltage signal is determined to determine whether the frequency of the voltage signal generated by the MCU is consistent with the signal of the resonant frequency of the pendulum. Specifically, when the frequency of the excitation voltage is consistent with the natural frequency of the pendulum, it can be found that the amplitude of the induced voltage signal collected by the ADC is high and the attenuation is slow, as shown in FIG. 9; when the frequency of the excitation voltage and the pendulum are When the natural frequency difference is large, the amplitude of the induced voltage signal collected by the ADC is small, as shown in Figure 10; when the frequency of the excitation voltage is close to the natural frequency of the pendulum, the induced voltage signal amplitude collected by the ADC The value is relatively large but decays faster, as shown in Figure 11. Therefore, the coil can be driven by using voltages of different frequencies. For example, it can be excited point by point in a step of 1 Hz around the possible resonant frequency of the pendulum to determine the resonant frequency of the pendulum. The MTC can drive the coil according to the resonant frequency. This allows the pendulum to produce the largest swing.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to be consistent with the current resonant frequency of the pendulum, so that the pendulum can always be in a resonant state, and the pendulum can be made in the case of manufacturing precision deviation, dust accumulation, and mechanical property change. The pendulum can be placed in a resonant state, so that the power consumption of the circuit can be minimized, and the pendulum swings. The amount of wind generated is the largest.

Figure 12 is a schematic circuit diagram of another embodiment of the present application.

As shown in FIG. 12, a micro-control unit (MCU) outputs a DAC driving signal. After the driving signal passes through the power amplifier, the coil is excited, and the pendulum swings under the driving voltage, and stops driving. After that, the induced voltage generated by the pendulum is sampled by the voltage sampling unit, and finally collected by the ADC unit through the amplifying unit. The specific workflow is the same as that of the embodiment shown in FIG. 7. For brevity, no further details are provided herein.

FIG. 13 is a schematic circuit diagram of still another embodiment of the present application. As shown in FIG. 13, the driving signal is driven by a direct digital synthesizer (DDS) and then amplified by power. The induced voltage generated by the driving coil is sampled, amplified, and then collected by the ADC module to obtain the induced voltage generated by the pendulum. The specific workflow is the same as that of the embodiment shown in FIG. 7. For the sake of brevity, details are not described herein again.

14 and 15 are typical sampling circuit structures of the voltage sampling unit, respectively. In Fig. 14, one end of the drive coil is grounded, and the other end is grounded through a diode. The output voltage signal after passing through the diode is connected to the drive unit of the electromagnetically driven pendulum as an input signal of the drive unit.

In Fig. 15, the voltage across the coil is correlated by an operational amplifier and output to the drive unit.

Figure 16 is a schematic circuit diagram of one embodiment of the present application.

As shown in FIG. 16, the driving signal generated by the MCU (for example, a PWM signal, a DAC signal, etc.) is passed through a power amplifying unit to drive the coil, thereby causing the pendulum to oscillate. At this time, the driving current generated by the pendulum is detected. The amplification unit performs amplification and then acquires through the ADC. The power amplifying unit, the micro control unit and the like constitute a driving unit in the electromagnetic driving type pendulum device shown in FIG. 1 , and the current sampling unit, the digital-to-analog converter and the like constitute the electromagnetic driving type pendulum device shown in FIG. 1 . Detection unit in the middle. It should be understood that the pendulum is not shown in the figure for the sake of brevity.

Specifically, the pendulum works under a plurality of driving signals of different frequencies generated by the MCU, and the driving current of the pendulum is collected. When the current is minimum in the working of the pendulum, the frequency of the corresponding driving signal is the resonant frequency of the pendulum, and the MCU can The driving signal of the resonant frequency continues to be generated, and the continuous pendulum always operates in a resonant state.

In particular, real-time continuous adjustment can be employed to enable the pendulum to remain operational at the inherent operating frequency. When operating at an initial drive frequency (eg 35 Hz), record the current amplitude, then add a small frequency increment (eg 0.5 Hz) based on the initial drive frequency, drive the pendulum, and record the current amplitude at this time. Value, if the amplitude of the current after the frequency increases, the increasing drive frequency is used as the reference frequency, continue to increase a small frequency increment, record the current amplitude, repeat the above steps until the current amplitude remains unchanged. Or become larger; when the current amplitude becomes larger, the drive frequency can be reduced until the current amplitude does not change or increases. In this way, the drive frequency can be locked to the resonant frequency of the pendulum. It should be understood that the above numerical values are exemplary and the application is not limited thereto.

Therefore, the method of the embodiment of the present application adjusts the driving frequency of the driving coil to be consistent with the current resonant frequency of the pendulum, so that the pendulum can always be in a resonant state, and the pendulum can be made in the case of manufacturing precision deviation, dust accumulation, and mechanical property change. The pendulum can be placed in a resonant state, so that the power consumption of the circuit can be minimized, and the amount of wind generated when the pendulum swings is maximized.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present application, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

The foregoing is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application. It should be covered by the scope of protection of this application. Therefore, the scope of protection of the present application should be determined by the scope of the claims.

Claims (16)

1. An electromagnetic driving swing device, comprising:

   Swing

   Driving a coil for receiving a driving signal, and driving the pendulum swing by using the driving signal, wherein the driving coil receives a new driving signal when a frequency of the driving signal is different from a resonant frequency of the pendulum And swinging the wobble plate with the new drive signal, wherein the frequency of the new drive signal is the resonant frequency.
2. The electromagnetically driven pendulum device of claim 1 further comprising:

   a detecting unit, configured to detect a resonant frequency of the pendulum;

   a driving unit, configured to generate the driving signal, and when the frequency of the driving signal is different from a resonant frequency of the pendulum, generate the new driving signal, and send the driving coil to the driving coil Describe the new drive signal.
3. The electromagnetically driven pendulum device according to claim 2, wherein

   The driving unit is further configured to: drive the pendulum in a first time period by using each of the driving signals of the plurality of frequencies, wherein the first duration is at least one swing period of the pendulum The plurality of frequencies are located in a first frequency interval, and the first frequency interval includes a resonant frequency of the pendulum;

   The detecting unit is configured to: respectively acquire an induced voltage generated by the pendulum in a second time period when each driving signal stops driving the pendulum, and the second duration is the pendulum At least one swing period;

   The driving unit is further configured to determine, as the resonant frequency of the pendulum, a frequency of a driving signal that generates the induced voltage with the largest amplitude and the slowest attenuation among the driving signals of the plurality of frequencies.
4. The electromagnetic drive swing device according to claim 2, wherein

   The driving unit is further configured to: drive the swinging of the pendulum in a third time period, wherein the third duration is at least one swinging period of the pendulum;

   The detecting unit is specifically configured to: detect a induced voltage generated by the pendulum in a fourth time period from when the swinging of the pendulum is stopped, wherein the fourth duration is at least one swing of the pendulum cycle;

   The driving unit is specifically configured to determine that the frequency of the induced voltage is a resonant frequency of the pendulum.
5. The electromagnetically driven pendulum device according to claim 3 or 4, wherein the detecting unit comprises a voltage sampling unit, and two input ends of the voltage sampling unit are respectively connected to both ends of the driving coil, The voltage sampling unit is configured to obtain an induced voltage generated by the pendulum;

   The driving unit includes a micro control unit and an power amplifying unit, an input end of the micro control unit is connected to an output end of the voltage sampling unit, and an output end of the micro control unit is connected to an input end of the power amplifying unit The two output ends of the power amplifying unit are respectively connected to two ends of the driving coil, wherein the micro control unit is configured to receive an induced voltage obtained by the voltage sampling unit, and according to the voltage sampling unit The obtained induced voltage determines the new driving signal, and sends the new driving signal to the power amplifying unit, the power amplifying unit is configured to power amplify the new driving signal, and apply the driving Both ends of the coil.
6. The electromagnetic drive swing device according to claim 2, wherein

   The driving unit is further configured to: drive the pendulum using each of the driving signals of the plurality of frequencies, wherein the plurality of frequencies are located in the second frequency interval, and the second frequency interval includes Representing the resonant frequency of the pendulum;

   The detecting unit is specifically configured to: acquire a driving signal required when the driving signal is driven by each of the driving signals Current

   The driving unit is further configured to determine a frequency of a driving signal that generates a minimum current among the driving signals of the plurality of frequencies as a resonant frequency of the pendulum.
7. The electromagnetically driven pendulum device according to claim 6, wherein the detecting unit comprises a current sampling unit for obtaining a current of a driving signal required to drive the pendulum;

   The driving unit includes a micro control unit and an power amplifying unit, an input end of the micro control unit is connected to an output end of the current sampling unit, and an output end of the micro control unit is connected to an input end of the power amplifying unit The two output ends of the power amplifying unit are connected to two ends of the driving coil, wherein the micro control unit is configured to receive a current value obtained by the current sampling unit, determine the new driving signal, and send The new driving signal is sent to the power amplifying unit, and the power amplifying unit is configured to perform power amplification on the new driving signal and apply it across the driving coil.
8. The electromagnetic drive pendulum device according to claim 1, further comprising: a detecting coil and a power amplifying unit;

   The detecting coil is coupled to the driving coil for detecting an induced voltage generated when the pendulum swings;

   Two input ends of the power amplifying unit are respectively connected to two ends of the detecting coil, and two output ends of the power amplifying unit are respectively connected to two ends of the driving coil, and the power amplifying unit is used for After the voltage across the detection coil is power amplified, the new drive signal is obtained, and the new drive signal is applied across the drive coil.
9. The electromagnetic drive pendulum device according to claim 8, wherein the electromagnetically driven pendulum device further comprises: an automatic gain control unit, the automatic gain control unit comprising a first input end and a second input end And the output end, the first input end is connected to the detecting coil, the first input end is for receiving a voltage across the detecting coil, and the second input end is connected to the driving coil, the first a second input end for receiving a voltage across the drive coil, the output end being coupled to an input end of the power amplification unit, the automatic gain control unit for utilizing a voltage across the drive coil The output terminal outputs a voltage that is consistent with a voltage frequency of the detection coil.
10. The electromagnetic drive pendulum device according to claim 1, further comprising: a power amplifying unit, an operational amplifier, and a bridge, wherein the bridge includes a first bridge arm having the drive coil, a second bridge arm of the first resistor, a third bridge arm having a third resistance, and a fourth bridge arm having a fourth resistor, wherein the second end of the first bridge arm and the first end of the second bridge arm Connected to the end, the second end of the third bridge arm is connected to the first end of the fourth bridge arm, and the first output end of the power amplifying unit is respectively connected with the first end of the first bridge arm The first ends of the three bridge arms are connected, and the second output ends of the power amplifying units are respectively connected to the second ends of the second bridge arms and the second ends of the fourth bridge arms, the operational amplifier Two input ends are respectively connected to the first end of the first bridge arm and the first end of the third bridge arm, and an output end of the operational amplifier is connected to an input end of the power amplifying unit;

    The operational amplifier is configured to subtract a potential of the first end of the first bridge arm and a potential of the first end of the third bridge arm, and output the result to the power amplifying unit;

    The power amplifying unit is configured to power amplify a voltage output by the operational amplifier to obtain the new driving signal, and apply the new driving signal to both ends of the driving coil.
11. The electromagnetically driven pendulum device according to claim 10, wherein a ratio of an internal resistance of the driving coil to the first resistance is a first ratio, and a ratio of the second resistance to the third resistance For the second ratio, The first ratio and the second ratio are equal.
12. A method for adjusting an electromagnetically driven pendulum, the electromagnetically driven pendulum comprising a drive coil and a pendulum, characterized in that it comprises:

    Transmitting a driving signal to the driving coil to drive the swinging of the swing with the driving signal;

    Transmitting a new driving signal to the driving coil when a driving frequency of a driving signal of the driving coil is different from a resonant frequency of the pendulum, wherein a driving frequency of the new driving signal is the resonant frequency, so that The drive coil drives the pendulum to oscillate.
13. The method of claim 12, further comprising:

    The resonant frequency of the pendulum is detected.
14. The method of claim 13 wherein said detecting a resonant frequency of said pendulum comprises:

    Driving the pendulum in a first time period using each of a plurality of frequency drive signals, wherein the first duration is at least one wobble period of the pendulum, and the plurality of drive frequencies are located a first frequency interval, the first frequency interval including a resonant frequency of the pendulum;

    Acquiring an induced voltage generated by the pendulum in a second time period when each driving signal stops driving the pendulum, and the second duration is at least one swing period of the pendulum;

    The frequency of the drive signal that generates the induced voltage having the largest amplitude and the slowest decay among the plurality of frequency drive signals is determined as the resonant frequency of the pendulum.
15. The method of claim 13 wherein said detecting a resonant frequency of said pendulum comprises:

    Driving the pendulum respectively using each of a plurality of frequency drive signals, wherein the plurality of frequencies are located in a second frequency interval, the second frequency interval comprising a resonant frequency of the pendulum;

    Obtaining a current of a driving signal required when the driving signal is driven by each of the driving signals;

    A frequency of a drive signal that generates a minimum current among the plurality of frequency drive signals is determined as a resonance frequency of the pendulum.
16. The method of claim 13 wherein said detecting a resonant frequency of said pendulum comprises:

    Driving the pendulum to swing during a third time period, wherein the third duration is at least one swing period of the pendulum;

    Detecting, in a fourth period of time from the start of the driving of the pendulum, an induced voltage generated by the pendulum, wherein the fourth duration is at least one wobble period of the pendulum;

    The frequency of the induced voltage is determined to be the resonant frequency of the pendulum.

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